JP2019108972A5

JP2019108972A5 -

Info

Publication number: JP2019108972A5
Application number: JP2018199905A
Authority: JP
Filing date: 2018-10-24
Publication date: 2023-04-13
Anticipated expiration: 2038-10-24

Claims

a housing, a bobbin disposed within the housing, a coil extending about the bobbin, the housing extending longitudinally between a first housing end and a second housing end; a solenoid in which a solenoid hole extending along a longitudinal axis is formed in the bobbin;
a valve body extending longitudinally from the first housing end and having a valve body hole formed therein;
at least one seat member disposed within the valve body bore;
a valve member having a head slidably disposed within the solenoid bore and a valve portion slidably disposed within the valve body bore ;
a biasing component operable to apply a biasing force against the valve member to bias the valve member toward the first position;
positioned at least partially within the solenoid aperture to apply a suction force to the valve member in operation, the suction force being directed toward the second housing end such that the suction force opposes the biasing force of the biasing member; a facing permanent magnet and
a pole piece disposed within the solenoid bore and longitudinally disposed between the permanent magnet and the head of the valve member;
a control circuit electrically connected to the coil and programmed to send pulses of current to the coil;
has
the valve portion of the valve member has a seat engaging member extending outwardly so as to engage with the seat member when the valve member slides within the solenoid hole and the valve body hole;
The valve member has a first position where the seat engaging member is displaced away from the first housing end and a second position where the seat engaging member is displaced toward the first housing end. and slide between
the valve body includes one or more ports;
the seat engaging member is operable to open and close the one or more ports of the valve body when the valve member longitudinally translates between the first and second positions;
The permanent magnet is formed of a material having a coercive force that provides a magnetic field responsive to the pulse of current, the pulse of current being transmitted through the coil and varying the magnitude of the attractive force on the permanent magnet. and said attractive force of said permanent magnet, in operation, pulls said valve member toward said second position when said variable attractive force magnitude is greater than said biasing force of said biasing member; The biasing force of the biasing component is characterized in that, in operation, when the magnitude of the variable suction force is less than the biasing force of the biasing component, the valve member is pushed toward the first position. Latching control valve assembly.

2. The latching control valve assembly of claim 1, wherein said pole piece is threadably disposed on said bobbin to adjustably longitudinally position said pole piece relative to said head of said valve member. A latching control valve assembly, characterized in that:

3. The latching control valve assembly of claim 2, wherein
the permanent magnet extends longitudinally between an inwardly facing end and an outwardly facing end;
the pole piece extends longitudinally between a first end facing the head of the valve member and a second end abutting an inwardly facing end of the permanent magnet;
said head of said valve member and said first end of said pole piece are longitudinally spaced apart from each other when said valve member is in said first position;
A latching control valve assembly, wherein said head portion of said valve member abuts said first end of said pole piece such that said spacing is eliminated when said valve member is in said second position.

4. The latching control valve assembly of claim 3, wherein
The bobbin has an inner surface forming the solenoid hole,
The inner surface of the bobbin is internally threaded,
When the valve member is in the first position, relative rotation of the pole piece within the solenoid aperture causes longitudinal displacement of the pole piece, causing the head of the valve member and the first end of the pole piece to move toward each other. said pole pieces are externally threaded adjacent said first end for mating with said internal threads of said bobbin such that said spacing between portions varies; control valve assembly.

5. The latching control valve assembly of claim 4, wherein said second end of said pole piece has a tool engaging contact surface.

2. The latching control valve assembly of claim 1, comprising:
at least two electrical connectors electrically connected to the coil;
and first and second leads electrically connecting said control circuit to said electrical connector.

7. The latching control valve assembly of claim 6, wherein said permanent magnet extends longitudinally between an inward end and an outward end and has a south pole at said inward end and a north pole at said outward end. A latching control valve assembly characterized by:

8. The latching control valve assembly of claim 7 , wherein said coil has a winding wound on said bobbin.

9. The latching control valve assembly of claim 8, wherein
the magnitude of the variable attractive force of the permanent magnet is increased by the control circuit supplying a positive voltage pulse of current to the first lead;
A latching control valve assembly, wherein the magnitude of said variable attractive force of said permanent magnet is reduced by said control circuit supplying a positive voltage pulse of current to said second lead.

10. The latching control valve assembly of claim 9, wherein the magnitude of said variable attractive force of said permanent magnet is maintained constant when no current is applied to said coil. control valve assembly.

2. The latching control valve assembly of claim 1, wherein said valve body extends between a proximal end adjacent said first housing end and a distal end spaced from said first housing end. A latching control valve assembly characterized by:

12. The latching control valve assembly of claim 11, wherein
The one or more ports in the valve body include a first port passing through the valve body at a position adjacent to the tip of the valve body , a second port passing through the valve body, and the valve. a third port passing through the valve body at a position adjacent to the proximal end of the body;
A latching control valve assembly, wherein said second port is longitudinally disposed between said first port and said third port.

13. The latching control valve assembly of claim 12, comprising:
the first port and the third port are located on opposite sides of the seat engaging member;
when the valve member is in the first position, the seat engaging member seals against the seat member to close the first port and open the third port;
A latching control valve, wherein the seat engaging member seals against the seat member to open the first port and close the third port when the valve member is in the second position. assembly.

13. The latching control valve assembly of claim 12, wherein said valve body is configured such that said first port serves as an inlet port, said second port serves as an outlet port, and said third port serves as an outlet port. A latching control valve assembly received in a cavity of a valve manifold.

12. The latching control valve assembly of claim 11, wherein said valve portion of said valve member comprises a first piston adjacent said distal end of said valve body and a second piston adjacent said proximal end of said valve body. and wherein said first and second pistons are operable to seal said valve body bore.

16. A latching control valve assembly according to claim 15, wherein pressure is balanced against said valve member by pressurized fluid acting in opposite directions against said first and second pistons and said seat member. , wherein said first and second pistons and said seat member are substantially the same diameter.

16. The latching control valve assembly of claim 15, wherein
a bushing provided within the housing and having a flange portion and a neck portion extending into the solenoid hole and radially disposed between the head portion of the valve member and the bobbin;
A latching control valve assembly, wherein said biasing component is longitudinally disposed between said second piston of said valve member and said flange of said bushing.

2. The latching control valve assembly of claim 1, comprising:
The bobbin has an inner surface forming the solenoid hole,
said head of said valve member being cylindrical, said head of said valve member being arranged to slip-fit said inner surface of said bobbin;
A latching control valve assembly, wherein said biasing component is a compression spring spirally extending around said head of said valve member.

2. The latching control valve assembly of claim 1, wherein said valve member is a unitary molded part in which said head and said valve portion of said valve member are integrally formed.

2. The latching control valve assembly of claim 1, wherein said permanent magnet is formed from neodymium.